//引入axios
import axios from 'axios'

let cancel ,promiseArr = {}
const CancelToken = axios.CancelToken;
//请求拦截器
axios.interceptors.request.use(config => {
//发起请求时，取消掉当前正在进行的相同请求
if (promiseArr[config.url]) {
    promiseArr[config.url]('操作取消')
    promiseArr[config.url] = cancel
} else {
    promiseArr[config.url] = cancel
}
    return config
}, error => {
return Promise.reject(error)
})

//响应拦截器即异常处理
axios.interceptors.response.use(response => {
return response
}, error => {
if (error && error.response) {
    switch (error.response.status) {
    case 400:
        error.message = '错误请求'
        break;
    case 401:
        error.message = '未授权，请重新登录'
        break;
    case 403:
        error.message = '拒绝访问'
        break;
    case 404:
        error.message = '请求错误,未找到该资源'
        break;
    case 405:
        error.message = '请求方法未允许'
        break;
    case 408:
        error.message = '请求超时'
        break;
    case 500:
        error.message = '服务器端出错'
        break;
    case 501:
        error.message = '网络未实现'
        break;
    case 502:
        error.message = '网络错误'
        break;
    case 503:
        error.message = '服务不可用'
        break;
    case 504:
        error.message = '网络超时'
        break;
    case 505:
        error.message = 'http版本不支持该请求'
        break;
    default:
        error.message = `连接错误${error.response.status}`
    }
} else {
    error.message = "连接到服务器失败"
}
message.error(error)
return Promise.resolve(error.response)
})

// axios.defaults.baseURL = '/api'
//设置默认请求头
axios.defaults.headers = {
'X-Requested-With': 'XMLHttpRequest'
}
axios.defaults.timeout = 10000

export default {
//get请求
get (url,param) {
    return new Promise((resolve,reject) => {
        axios({
            method: 'get',
            url,
            params: param,
            cancelToken: new CancelToken(c => {
            cancel = c
            })
        }).then(res => {
            resolve(res)
        })
        })
},
//post请求
post (url,param) {
    return new Promise((resolve,reject) => {
        axios({
            method: 'post',
            url,
            data: param,
            cancelToken: new CancelToken(c => {
            cancel = c
            })
        }).then(res => {
            resolve(res)
        })
        })
}
}